//
//  WelcomeViewController.swift
//  SinaWeibo
//
//  Created by yhlun on 15/11/17.
//  Copyright © 2015年 yhlun. All rights reserved.
//

import UIKit
import SnapKit
import SDWebImage

class WelcomeViewController: UIViewController {

    
    override func loadView() {
        view = backImage
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()

        setupUI()
    }
    
    override func viewDidAppear(animated: Bool) {
        super.viewDidAppear(animated)
        startAnimation()
    }
    
    //MARK: 添加动画效果
    
    func startAnimation(){
    
        self.iconImage.snp_updateConstraints(closure: { (make) -> Void in
            make.bottom.equalTo(self.view.snp_bottom).offset(-self.view.bounds.height + 180)
        })
        
        UIView.animateWithDuration(1.2, delay: 0, usingSpringWithDamping: 0.9, initialSpringVelocity: 9.8, options: [], animations: { () -> Void in
            //强制刷新页面
            self.view.layoutIfNeeded()
            }) { (_) -> Void in
                UIView.animateWithDuration(0.6, animations: { () -> Void in
                    self.welcomeLable.alpha = 1
                    }, completion: { (_) -> Void in
                        
                        NSNotificationCenter.defaultCenter().postNotificationName(AppSwitchRootViewControler, object: nil)
                })
        }
        
    }
    
    //MARK: 添加子视图
    
    func setupUI() {
    
        view.addSubview(iconImage)
        view.addSubview(welcomeLable)
        
        //添加约束
        iconImage.snp_makeConstraints { (make) -> Void in
            make.centerX.equalTo(view.snp_centerX)
            make.bottom.equalTo(view.snp_bottom).offset(-180)
            make.width.equalTo(90)
            make.height.equalTo(90)
        }
        
        welcomeLable.snp_makeConstraints { (make) -> Void in
            make.top.equalTo(iconImage.snp_bottom).offset(20)
            make.centerX.equalTo(view.snp_centerX)
        }
        
        //加载图片
        iconImage.sd_setImageWithURL(AccountViewModel().headURL, placeholderImage: UIImage(named: "avatar_default_big"))
        
        //将图片处理成圆角
        iconImage.layer.cornerRadius = 45
        iconImage.layer.masksToBounds = true
        
    }


    //懒加载所有的视图控件
    private lazy var backImage: UIImageView = UIImageView(image: UIImage(named: "ad_background"))
    
    //头像
    private lazy var iconImage: UIImageView = UIImageView()
    
    private lazy var welcomeLable: UILabel = UILabel(title: (AccountViewModel().userName ?? "") + " 欢迎回来", size: 19, color: UIColor.lightGrayColor())
   

}
